Rose plant named &#39;poulcs012&#39;

ABSTRACT

A new garden rose plant of the floribunda class which has abundant, light yellow flowers and attractive foliage. This new and distinct variety has shown to be uniform and stable in the resulting generations from asexual propagation.

SUMMARY OF THE INVENTION BOTANICAL CLASSIFICATION

Rosa hybrida

VARIETY DENOMINATION

‘Poulcs012’

The present invention constitutes a new and distinct variety of gardenrose plant which originated from a controlled crossing between thefemale seed parent, an unnamed seedling, and the male pollen parent‘Poulsun’, U.S. Plant Pat. No. 9,716. The two parents were crossedduring the summer of 1992 and the resulting seeds were planted in acontrolled environment in Fredensborg, Denmark. The new variety named‘Poulcs012’ originated as a single seedling from the stated cross.

The new variety may be distinguished from its unnamed female seedparent, by the difference in flower color. While the seed parent hascreamy white flowers, ‘Poulcs012’ has medium yellow flowers.

The new variety may be distinguished from its male pollen parent,‘Poulsun’ by the following combination of characteristics:

-   -   1. While the pollen parent ‘Poulsun’ has flower petals which are        Yellow Group 13A on the upper surface, ‘Poulcs012’ has flower        petals which are Yellow Group 4C.    -   2. While the pollen parent reaches a height of 12 inches (30        cm), ‘Poulcs012’ grows taller, to a height of 60 cm.

The objective of the hybridization of this rose variety was to create anew and distinct variety for garden use with unique qualities, such as:

-   -   1. Uniform and abundant light yellow flowers;    -   2. vigorous, but compact growth when propagated both as a budded        rose and on its own roots;    -   3. Disease resistance;    -   4. Continuous. flowering.

This combination of qualities is not present in previously availablecommercial cultivars of this type, known to the inventors, anddistinguish ‘Poulcs012’ from all other varieties of which we are aware.

As part of their rose development program, L. Pernille Olesen and MogensN. Olesen germinated the seeds from the aforementioned hybridizationduring winter of 1992 and conducted evaluations on the resultingseedlings in a controlled environment in Fredensborg, Denmark.

‘Poulcs012’ was selected in the spring 1993 by the inventors as a singleplant from the progeny of the aforementioned hybridization.

Asexual reproduction of ‘Poulcs012’ by traditional budding and rootedcuttings was first done by L. Pernille and Mogens N. Olesen in theirnursery in Fredensborg, Denmark in July, 1993. This initial and othersubsequent asexual propagations conducted in controlled environmentshave demonstrated that the characteristics of ‘Poulcs012’ are true totype and are transmitted from one generation to the next.

BRIEF DESCRIPTION OF THE DRAWING

The accompanying color illustration shows as true as is reasonablypossible to obtain in color photographs of this type, the typicalcharacteristics of the buds, flowers, leaves, and stems, of ‘Poulcs012’.Specifically illustrated in the first drawing:

FIG. 1.1; Open flower, stem showing cluster of open flowers, branching,and the attachment of leaves, buds, and peduncles;

FIG. 1.2; Flower bud closed, flower bud as sepals unfold, and partiallyopen;

FIG. 1.3; Flower petals, detached;

Specifically illustrated in the second drawing:

FIG. 2.1; Sepals, receptacle, and peduncle;

FIG. 2.2; Juvenile leaf;

FIG. 2.3; Mature leaves;

FIG. 2.4; Bare stems exhibiting thorns.

DETAILED DESCRIPTION OF THE VARIETY

The following is a description of ‘Poulcs012’, as observed in its growthin a field nursery in Jackson County, Oregon. Observed plants are 3years of age. Plants were grown on Rosa multiflora understock. Colorreferences are made using The Royal Horticultural Society (London,England) Colour Chart, 1995, except where common terms of color areused.

For a comparison, several physical characteristics of the rose variety‘Pouljill’, U.S. Plant Pat. No. 12,522 are compared to ‘Poulcs012’ inChart 1. ‘Poulcs012’ ‘Pouljill’ Petalage 30 to 35 petals 35 to 40 petalsPlant height 60 cm 100 cm at full maturity. Upon opening: Yellow Group4C. Yellow Group 13B flower petals with marginal zone inner surfaceYellow Group 11D. of inner petals.

FLOWER AND FLOWER BUD

-   Blooming habit: Continuous.-   Flower bud:    -   -   Size.—Upon opening, 18 mm in length from base of receptacle            to end of bud. Diameter is 15 mm.        -   Bud form.—Broadly ovate to spherical.        -   Bud color.—As sepals unfold, petals are Yellow Group 2C with            intonations of Red Group 47A. At ¼ opening petals are Yellow            Group 4D.        -   Sepals.—Upper Surface: Color: Yellow-Green Group 143C with            anthocyanic pigments of Greyed-Red Group 181B. Surface:            Moderately pubescent. Lower Surface: Color: Yellow-Green            Group 143C with anthocyanic pigments of Greyed-Purple Group            184C. Texture: Smooth with abundant and very fragrant            stipitate glands. Sepal Shape: Sepal apex is cirrhose. Base            is flat at union with receptacle. Sepal Margin: Margins have            strong foliaceous appendages on three of the five sepals.            Size: 18 mm (l)×8 mm (w).        -   Receptacle.—Surface Texture: Smooth and glabrous. Shape:            Funnel shaped. Size: 4 mm (h)×6 mm (w). Color: Yellow-Green            Group 144A. Anthocyanic pigments the color of Greyed-Orange            Group 167A observed.        -   Pedicel.—Surface: Heavy stipitate glands and fragrant.            Length: 20 to 25 mm average length. Diameter: 3 mm on            average. Color: Yellow-Green Group 144B. Weak anthocyanic            pigments the color of Greyed-Red Group 180B observed.            Strength: Strong.        -   Borne.—In clusters of 21 flowers, 7 buds per individual            flowering stem.        -   Peduncle.—Length: 60 to 100 mm. Diameter: Normally 4 mm.            Color: Yellow-Green Group 144B. Texture: Smooth.-   Flower bloom:    -   -   Fragrance.—Moderate wild rose scent.        -   Duration.—The blooms have a duration on the plant of            approximately 10 to 14 days. After flowers completely            mature, petals fall cleanly away from plant.        -   Size.—Flower diameter is 53 mm when open. Flower depth is 27            mm on average.        -   Form.—Calathiform. Shape of flower when viewed from the side            : Upon opening, upper part:Flat. Upon opening, lower            part:Flat. Open flower, upper part: Flat. Open flower, lower            part: Concave        -   Petalage.—Average range is 30 to 35 petals under normal            conditions with 10 petaloids.-   Color:    -   -   Upon opening, petals.—Outermost petals: Outer side: Yellow            Group 4D. Inner Side: Yellow Group 4C. Innermost petals:            Outer side: Yellow Group 4D. Inner Side: Yellow Group 4C.        -   After opening, petals.—Outermost petals: Outer side: Yellow            Group 4D. Inner Side: Yellow Group 4C. Innermost petals:            Outer side: Yellow Group 4D. Inner Side: Yellow Group 4C.-   General tonality: On open flower Yellow Group 4D. No change in the    general tonality at the end of the tenth day.-   Petals:    -   -   Petal reflex.—Somewhat reflexed.        -   Margin.—Entire and uniform. Weak to medium undulations of            margin observed.        -   Shape.—Apex: Round. Base: Acute. Petals are generally            broadly elliptic.        -   Size.—35 mm (l)×32 mm (w).        -   Texture.—Smooth.        -   Thickness.—Average.        -   Arrangement.—Not Formal.-   Petaloids:    -   -   Quantity.—8 to 12.        -   Color.—Upper Surface: Yellow Group 4C. Lower Surface: Yellow            Group 4D.        -   Size.—30 mm (l)×28 mm (w).        -   Shape.—Elliptical. Base and apex are acute.-   Reproductive organs:    -   -   Pistils.—Length: 5 mm long. Quantity: 59 (actual count).        -   Pollen.—None observed.        -   Anthers.—Size: 1 to 2 mm in length. Color: Greyed-Orange            Group 163B. Quantity: 99 (actual count).        -   Filaments.—Color: Yellow Group 9A. Length: 4 mm.        -   Stigmas.—Superior relative to the length of filaments and to            the height of the anthers. Color: Greyed-Yellow Group 162A.        -   Styles.—Color: Yellow-Green Group 150D. Other Intonations:            Red-Purple Group 57A.        -   Hips.—None Observed in the field nursery in Jackson County            Oregon.

Plant

-   Plant growth: Moderate, upright to bushy. When grown as a budded    field grown plant on Rosa multiflora understock, the average height    of the plant is 60 cm and the average width is 60 cm.-   Stems:    -   -   Color.—Young wood: Yellow-Green Group 144B. Older wood:            Yellow-Green Group 144B.        -   Surface texture.—Young wood: Smooth. Older wood: Smooth.-   Thorns:    -   -   Incidence.—4 thorns per 10 cm of stem.        -   Size.—9 mm.        -   Color.—Greyed-Orange Group 177B.        -   Shape.—Deeply concave.-   Plant foliage: Normal number of leaflets on normal leaves in middle    of the stem: 5 leaflets.    -   -   Compound leaf size.—150 mm in length by 120 mm wide.        -   Quantity.—On average, there are 3 leaves per 10 cm of stem.        -   Color.—Mature Foliage: Upper surface is: Green Group 137A to            Yellow-Green Group 144A. Lower surface is: Yellow-Green            Group 147C. Juvenile foliage: Upper surface is: Yellow-Green            Group 144A. Lower surface is: Yellow-Green Group 144B.-   Plant leaves and leaflets:    -   -   Stipules.—Size: 20 mm in length. Shape: Linear with outward            extending apecies. The apex is acute. Base is flat at the            union with the petiole. Quantity: 2 per compound leaf.            Margins: Finely serrated with abundant stipitate glands.            Color: Yellow-Green Group 144A.        -   Petiole.—Length: 25 mm. Above: Color: Yellow-Green Group            144B. Underneath: Observations: Thorns observed. Color:            Yellow-Green Group 144A.        -   Rachis.—Length: 53 mm. Above: Color: Yellow-Green Group            144B. Underneath: Observations: Thorns observed. Color:            Yellow-Green Group 144A.        -   Leaflet.—Edge: Serrated. Size: 45 to 68 mm (l)×25 to 42 mm            (w). Shape: Ovate. Apex is cuspidate. Base is round.            Texture: Smooth. Thickness: Thick. Arrangement: Odd pinnate.            Venation: Reticulate. Glossiness: Glossy.-   Disease resistance: Above average resistance to mildew, rust, black    spot, and Botrytis under normal growing conditions in Jackson    County, Oregon.-   Cold hardiness:

The variety ‘Poulcs012’ has been found to be cold tolerant to USDA ColdHardiness Zone 6.

1. A new and distinct variety of rose plant of the floribunda rose classnamed ‘Poulcs012’, substantially as herein illustrated and described asa distinct and novel rose variety due to its abundant light yellowflowers, disease resistance, and extended period of bloom: